Without using eBay, the BST is pretty much your only option. If you really want a Rev-i, but don't see one, you could always put a WTB thread in the various forums and see if you get any hits. There could be someone with a Rev-i who is just too lazy to put up a BST thread, but would probably sell it if they knew there would be a buyer.

I've never used an FX for more than just holding it and shooting a bit over a chrono, so I can't really give a good comparison, but I can say the Rev-i is an awesome gun.

You take the same risks whether you're buying on ebay or BST. If the funds are coming through paypal, generally they favor the buyer in cases of dispute. DP guns are easy to fix and usually only require changing a couple of orings, if needed. So getting a lemon DP isn't a huge deal for me, especially since I do a complete breakdown maintenance anyways.

Rev-i's are tough to find because they were manufactured in much smaller numbers, and it seems people tend to keep their rev-i. If you're not pressed for time, just be patient and wait for a deal to spring up.

You take the same risks whether you're buying on ebay or BST. If the funds are coming through paypal, generally they favor the buyer in cases of dispute. DP guns are easy to fix and usually only require changing a couple of orings, if needed. So getting a lemon DP isn't a huge deal for me, especially since I do a complete breakdown maintenance anyways.

Rev-i's are tough to find because they were manufactured in much smaller numbers, and it seems people tend to keep their rev-i. If you're not pressed for time, just be patient and wait for a deal to spring up.

Ended up getting a Rev-I from ebay. The funny thing I found is that the ebay seller also had an old thread in the BST section. Also you are right about how owners like to keep their guns.